/*
 * BEEM is a videoconference application on the Android Platform.
 * Copyright (C) 2009 by Frederic-Charles Barthelery,
 * Jean-Manuel Da Silva,
 * Nikita Kozlov,
 * Philippe Lago,
 * Jean Baptiste Vergely,
 * Vincent Veronis.
 * This file is part of BEEM.
 * BEEM is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * BEEM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with BEEM. If not, see <http://www.gnu.org/licenses/>.
 * Please send bug reports with examples or suggestions to
 * contact@beem-project.com or http://dev.beem-project.com/
 * Epitech, hereby disclaims all copyright interest in the program "Beem"
 * written by Frederic-Charles Barthelery,
 * Jean-Manuel Da Silva,
 * Nikita Kozlov,
 * Philippe Lago,
 * Jean Baptiste Vergely,
 * Vincent Veronis.
 * Nicolas Sadirac, November 26, 2009
 * President of Epitech.
 * Flavien Astraud, November 26, 2009
 * Head of the EIP Laboratory.
 */
package com.beem.project.beem.service;

import android.os.AsyncTask;
import android.os.RemoteException;
import android.util.Log;
import com.beem.project.beem.service.aidl.IXmppConnection;
import com.beem.project.beem.service.aidl.IXmppFacade;

/**
 * This is an asynchronous task that will launch a connection to the XMPP server.
 * 
 * @see android.os.AsyncTask
 * @author Da Risk <da_risk@elyzion.net>
 */
public class LoginAsyncTask extends AsyncTask<IXmppFacade, Integer, Boolean> {

	/**
	 * State of a running connection.
	 */
	public static final int STATE_CONNECTION_RUNNING = 0;
	/**
	 * State of an already connected connection but authentication is running.
	 */
	public static final int STATE_LOGIN_RUNNING = 1;
	/**
	 * State of a connected and authenticated succesfully.
	 */
	public static final int STATE_LOGIN_SUCCESS = 2;
	/**
	 * State of a connected but failed authentication.
	 */
	public static final int STATE_LOGIN_FAILED = 3;

	private static final String TAG = "BeemLoginTask";

	private IXmppConnection mConnection;
	private String mErrorMessage;

	/**
	 * Constructor.
	 */
	public LoginAsyncTask() {}

	@Override
	protected Boolean doInBackground(IXmppFacade... params) {
		boolean result = true;
		IXmppFacade facade = params[0];
		try {
			publishProgress(STATE_CONNECTION_RUNNING);
			mConnection = facade.createConnection();
			if (!mConnection.connect()) {
				mErrorMessage = mConnection.getErrorMessage();
				return false;
			}
			publishProgress(STATE_LOGIN_RUNNING);

			if (!mConnection.login()) {
				mErrorMessage = mConnection.getErrorMessage();
				publishProgress(STATE_LOGIN_FAILED);
				return false;
			}
			publishProgress(STATE_LOGIN_SUCCESS);
		} catch (RemoteException e) {
			mErrorMessage = "Exception during connection :" + e;
			result = false;
		}
		return result;
	}

	/**
	 * Make sur to call the parent method when overriding this method.
	 */
	@Override
	protected void onCancelled() {
		try {
			if (mConnection != null && mConnection.isAuthentificated()) {
				mConnection.disconnect();
			}
		} catch (RemoteException e) {
			Log.d(TAG, "Remote exception", e);
		}
	}

	/**
	 * Get the error Message.
	 * 
	 * @return the error message. null if no error
	 */
	public String getErrorMessage() {
		return mErrorMessage;
	}
}
